The Structure and Habits of SpidersEmerton, J. H. (James Henry)
Science
The Structure and Habits of Spiders
Emerton, J. H. (James Henry)
Spiders
One palpal organ is usually inserted at a time, and, after a while,
taken out, and replaced by the other; this change being repeated many
times by the same spider. Among the _Lycosidæ_, Fig. 10, the male leaps
on the back of the female, and is carried about by her, Fig. 52. He
reaches down at the side of her abdomen, and inserts his palpi in the
epigynum underneath. In _Linyphia_ and _Theridion_ the male and female
live peaceably together for a long time in the same web. The male
reaches from in front under the female, Fig. 53, and inserts his palpal
organs, one after the other, for hours together. In _Agalena_ the male
is the stronger of the two sexes. He takes the female in his mandibles,
and lays her on one side, Fig. 54, and inserts one of his palpi. After
a time, he rises on tiptoe, turns her around and over, so that she lies
on the other side, with her head in the opposite direction, and inserts
the other palpus. The female lies as though dead. In _Nephila_ and
_Argiope_, where the male is very small, he stands on the upper edge of
the web while the female is in her usual position in the centre. After
feeling the web with his feet for some time, he runs down to the centre
so lightly as not to disturb the female, and climbs about over her body
for some minutes, in an apparently aimless way. She takes no notice
of him at first; but at length, especially if he approach the under
side of her abdomen, she turns, and snaps at him with her jaws. He is
usually nimble enough to dodge between her legs, and drop out of the
web, and, after a while, climbs up to the top, and begins over again.
In these encounters the males are often injured; they frequently lose
some of their legs: and I have seen one, that had only four out of his
eight left, still standing up to his work.
[Illustration: Fig. 53.]
[Illustration: Fig. 54.]
[Illustration: Fig. 55.]
At length the male succeeds in getting under the female’s abdomen, and
inserting his palpi into the epigynum. Fig. 55 shows the female hanging
in the web, with the male at _a_, with his legs grasped around her
abdomen.
The habits of these spiders furnish the grounds for the popular story,
that female spiders regularly eat the males. No doubt it occasionally
happens, where the female is the larger of the two; but in many species
they live together for some time in the same web, or in a nest spun for
the purpose; in some cases, before the female has reached the adult
state.
LAYING EGGS.
When the eggs are mature, the female proceeds, like the male, to make
a little web, and lays the eggs on it. Then she covers them over with
silk, forming a cocoon, in which the young remain till some time after
they are hatched. The laying of the eggs is seldom seen; for the spider
does it in the night, or in retired places; and often, in confinement,
refuses to lay at all.
[Illustration: Fig. 56.]
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